According to Apple, it will be able to run JavaScript 80 percent faster than before. Rather, it will allow your computer to access files much more quickly, leading to a noticeable improvement when moving or copying files. Because this is a back-end change, it won't change the way your files and folders are organized. Most of the changes are designed to improve the speed and efficiency of your computer.
The look and feel of High Sierra is very similar to Sierra. You cannot purchase a physical copy at a retail store.
As with previous versions, macOS High Sierra is only available as an online download.
